With a 50 amp electrical system in my RV, I'd like to install a Multiplus 3000 inverter/charger. I have three Battle Born LiPO4 batteries in parallel. My shore power is a 4-wire and there are two legs on the distribution panel. One of the companies that sells Victron adds a "Smart Phase Selector" in their 50 Amp RV upgrade. Can I install the Multiplus 3000 without this added device?Will the inverter/charger work in this regard?